8 Verm. 
VERMES. 
rather to speak of them as lasting ova. The effects of the parasitic 
habit are illustrated by Seison and A Ibertia. 
Joliet (43) takes a similar view with Eckstein as to the lasting ova. 
He enters, in great detail, into a discussion of the characters of the ova, 
and of the relation of fertilized and parthenogeuetic products to the sub- 
sequent presence of rnalos. Tho fecundated ogg does alone oxpol the 
polar globules. Considerable information is afforded as to the earlier 
stages of development. 
Distyla , g. n., fqr D. gissensis and D. ludwigi [? ludovici ], Eckstein (40). 
Floscularia hoodi , F. ambigua, F. longicaudata. F. regalis , and F. sp., 
all British ; Hudson (41). 
Asplanchna ebbesborni , sp. n., Hudson (42). 
Hudson (41) gives a “ key ” to the known species of Floscularia. 
For a list of the Leicestershire Rotifers, see Rep. Leicest. Soc. 1882-83, 
P-28. 
For Vejdovsky on Drilophaga bucephalus , g. & sp. nn., cf. Zool. Anz. 
vi. p. 356. 
GEPHYREA. 
44. Haswell, W. A. Preliminary Note on an Australian Species of 
Fhoronis. . P. Linn. Soc. N. S. W. vii. pp. 606-608. 
45. Hatschek, B. Ueber Entwicklung von Sipunculus modus. Arb. z. 
• Inst. Wien, v. pp. 61-140, 6 pis. 
46. Lankester, E. Ray. On Specimens of the Gephyrean Hamingia 
arctica , Kor. & Dan., from the Hardanger Fjord. Ann. N. H. (5) 
xi. pp. 37-43. 
47. Selenka, E. Die Sipunculiden (as part of Semper’s Reiseu im 
Archipel des Philippinen). Wiesbaden : 1883, pt. i. pp. 1-56, 15 pis. 
(A report is delayed till next year, the work having been completed 
in 1884.) 
48. Sluiter, C. P. Ueber einige Sternwurmer des indischen Archipels. 
Zool. Anz. vi. pp. 222-228. 
Lankester (46) makes a careful comparison of the characters of Ha- 
mingia, Thalassema, and Bonellia-, he finds that the male of the first re- 
sembled that of the last-named genus in being diminutive and attached 
to the female ; the corpuscles of the perivisceral fluid of Ilamingia aro 
tinged with haemoglobin. 
Hatschek (45) finds many points of agreement in the developmental 
histories of Sipunculus and Phascolosoma. The Echiuridce appear to 
agree completely with the Annelida in the essential characters of their 
development, and ought to form a sub-class among them ; while the 
“ Sipunculacea ” should occupy the place in the system lately occupied by 
the “ Gephyrea .” In Sipunculus the rudiment of the ventral medulla is 
median, and completely unpaired. The stage of the trochopore-larva is 
suppressed in Sipunculus, 
Sluiter (48) has a preliminary notice of his investigations on Loxo- 
siphon aspergillum of Quatrefages (for which he institutes a new genus, 
